c++ - Calculating accurate cpu usage per task in assembly -

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i've multi-task program written in c++ , want calculate cpu usage each of threads in sub second basis (may 100 ms) may know /proc/stat or didn't have accuracy resolution of time.

i want know there way calculate clock cycles consumed each thread in assembly or c/c++?

starting linux 2.6.12 , glibc 2.4, can use clock_gettime clock of type clock_thread_cputime_id realiable timing information


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